Website Carbon Footprint

A website needs electricity across devices, networks and computing infrastructure. Carbon-footprint estimates try to translate some of that energy use into emissions using assumptions about data transfer, traffic, equipment, hosting and electricity generation. Different models use different boundaries and factors, so two calculators may give different totals for the same page.

For site owners, the practical work often overlaps with ordinary performance improvements: compress appropriate images, avoid unnecessary video autoplay, reduce unused scripts, cache responses and measure how much data a common visit transfers. Hosting choices and the audience's device mix also matter. Fewer bytes do not always imply a fixed or proportional emissions reduction, and a small page-size score is not a certified carbon inventory.

A credible estimate should document its method, period and excluded sources. Avoid converting a single homepage test into an exact annual climate claim without representative traffic and assumptions. Website carbon footprint is a sustainability accounting topic, while Core Web Vitals measures user-perceived loading and responsiveness.